Francis designs the searches that decide whether a review finds everything it should. An information specialist with library science and health informatics training, he builds and documents reproducible strategies across MEDLINE, Embase, CINAHL, PsycINFO, Cochrane CENTRAL, Web of Science, and Scopus, translating a single concept into the controlled vocabulary and syntax each database demands. His work covers grey literature searching, citation chasing, deduplication, and the transparent reporting that PRISMA-S now requires. He peer-reviews search strategies using the PRESS checklist so errors surface before screening begins. Review teams rely on Francis when sensitivity, precision, and full reproducibility all have to hold at once.